It's a hard question - I most admire Death ofc.
favourite would be Insomnium (because of the sound of the quitars), Omnium gatherum (because of the voice of the singer - I mean that's the most brutal growl probably) or Wolfheart (they are masters of changing death parts of the song and the more calm, melodic parts - I mean it's really hard to put a piano into death metal in a way that it would sound natural).